DebRD_ATL said:

Almost every unanswerable question in these threads is unanswerable because three things changed in the same fortnight, and no amount of subsequent…

That is right, and it stops being right at the edges. The general case is well behaved; the interesting cases in this thread are all at the boundary where the general case breaks.

MikeNYC_runner said:

Agreed, with a caveat about community reputation: it is a lagging indicator.

Genuinely useful, thank you. I had the facts and not the framework.

DebRD_ATL said:

Almost every unanswerable question in these threads is unanswerable because three things changed in the same fortnight, and no amount of subsequent…

I read this differently from DebRD_ATL, on substance rather than tone. I would resist the confidence. Half of what this board was certain about two years ago has since been quietly dropped, and nobody went back to correct the threads.

That is the short version; the long version is somebody else's post.

One concrete data point for the thread. One habit that pays for itself: post the method alongside the number. A figure without its method cannot be checked, and an unchecked figure is how this community accumulates folklore.

Moderator note: a post naming a supplier has been edited. Discuss suppliers in the review sections, not here.